Driving-belt.



No. 826,899. I PATENTED JULY 24,1906.

H. E. SMALLBONE.-

DRIVING BELT.

APPLICATION FILED JAN. 29, 1906.

In W

. ro apart in parallel relation to leave the central i line of -spacesh between the clamps D, which .thus 'form 'teeth, )thersaid spaces being just vsufficientlylargeto receive the teeth of the pulleyB-v r "It is not uncommon in sewing-machines to rotatethe larger pulley 'atfour thousand five v hundred and the smaller pulley atnine thousand or even thirteen thousand five hundred =rev'olutions per minute. Such high s eed 2o renders it inadvisable in practice to relya one upon engagement of the clamps D with the sodketsd; By providing theteeth f onthe smaller pulley and adoublebelt with the .-(sipac esit all danger of slipping between the living and driven parts is thus overcome. As all the layers of the belt are ofthe same width and ofthe same strengthfthroughout, -thes'train is equally distributed "across its width, and there is nodanger of shifting of the clamps from their-position at right angles to the length of the belt. In the event that' the belt becomes loose from any cause the. teeth fwill prevent its jumping or failing to register at. the clamps with the sockets cl.

3 5 The teeth also make it'possible to employ a belt of less tension than would otherwise be. a

necessary, thus relieving strain 'upon the t shafts The single belt (shown in Beasts If desired, the larger-pulley-A may also be formed with teeth f. The sockets a, and d naturally engage only the inner sides or'lengths of the clamps D, tending to turn them on axes at right'anglesto the length of the belt, with consequent danger of permitting them to slip upon the pulleys.\ The teeth f, h0wever, 1nesh with and engage both .the upper and lower lengths of the clamps,

and thus overcome the danger.

e What I-claim as new, and desire to secure by Letters Batenl, is-

1. A driving-belt, of the character de-- scribed, comprising, in combination. a -sub stantially. inelastic wovemfabr'ic tape wound upon itself to produce a fiexible'laminated endless band, and a series of transyerse uniformly-spaced clamps of oblong shape bent around the said band and compressed there on to hold the laminze together and form sprocket-whoel-engaging bars.

2. A driving-belt, of the character described; comprising, in combination a pair of similar, substantially inelastic wovendabric tapes, each wound upon tself to produce-a flexible laminated endless band, and a series of tran'syerse uniformly-spaced clamps of oblong shape bent around the said bands and compressed thereon to hold the laminze \to-' gether and the bands apart in parallel spaced relatlonand form the sprocket wheel-engag ing bars. v HARRY E. SMALLBQNE. f In presence of 

